42560639 has 8 divisors (see below), whose sum is σ = 49161168. Its totient is φ = 36415360.

The previous prime is 42560519. The next prime is 42560647. The reversal of 42560639 is 93606524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42560639 - 2⁸ = 42560383 is a prime.

It is a super-2 number, since 2×42560639² = 3622815984176642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42560599 and 42560608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42560699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113612 + ... + 113985.

It is an arithmetic number, because the mean of its divisors is an integer number (6145146).

Almost surely, 2^42560639 is an apocalyptic number.

42560639 is a deficient number, since it is larger than the sum of its proper divisors (6600529).

42560639 is a wasteful number, since it uses less digits than its factorization.

42560639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227625.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 42560639 is about 6523.8515464410. The cubic root of 42560639 is about 349.1424967431.

The spelling of 42560639 in words is "forty-two million, five hundred sixty thousand, six hundred thirty-nine".